44 R. A. EmErson 
types, the total numbers of the respective classes being 29, 5, and 18. 
The expected numbers, 29, 10, and 13, show a deviation from expecta- 
tion which might result thru chance about once in nine trials, P equaling 
0.11. 
Later behavior of F, dilute sun red IVa.— Dilute sun red plants of Fe 
should be of two sorts, AAbbplpl and Aabbplpl. Five such plants 
were tested, with results as shown in table 12 (page 129). Of these five, 
two bred true, producing a total of 92 dilute sun red plants (group 2). 
One of these two, when backcrossed with green,-gave 69 dilute sun red 
plants. Three of the five F2’s gave in F; dilute sun reds and greens, 62 
of the former and 17 of the latter (group 1). The theoretical numbers 
were 59 and 20, respectively. The deviation of 3 plants is only a little 
ereater than the probable error, + 2.6. With two of the F, dilute sun red 
plants breeding true and three again throwing segregates, expectation 
was very nearly realized. 
Later behavior of F2 brown V.— Brown SRNE of F, are expected to be 
of four genotypes and to show consequent differences in behavior in Fs 
as follows: 
F; color types 
F, genotypes 
Brown. Green 
V6. BIB RR i ee aa ea ee ee 1 
2010) BeBIRE Diss Sd eS CEA oe ee Se 3 
DOC) BOGE UL Palace rm atcha ee ee PIO Occ ES 3 1 
AE= CRG B VOL Dis ce Nat er ene Ia Ree Sn gM ee LS eater eee 9 
Data for F; from fourteen Fs. brown plants are presented in table 13 
(page 130). Five self-pollinated F, browns (group 1) gave, in addition 
to one sun red presumably due to accidental pollination, 96 browns and 
74 greens in F;, which is almost exactly a 9:7 relation, the deviation being 
0.4 + 4.4. ‘Nine other selfed F. browns (group 2) gave in F; a total of 354 
brown and 104 green plants. An exact 3:1 ratio for the total of 458 - 
would be 343.5 and 114.5, respectively, the deviation being 10.5 + 6.3. 
Such a deviation might be expected thru chance alone about once in four 
